21074508928 has 32 divisors (see below), whose sum is σ = 45801137520. Its totient is φ = 9579321600.

The previous prime is 21074508911. The next prime is 21074508943. The reversal of 21074508928 is 82980547012.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7482438 + ... + 7485253.

Almost surely, 2^21074508928 is an apocalyptic number.

It is an amenable number.

21074508928 is an abundant number, since it is smaller than the sum of its proper divisors (24726628592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21074508928 is a wasteful number, since it uses less digits than its factorization.

21074508928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14967716 (or 14967704 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 21074508928 in words is "twenty-one billion, seventy-four million, five hundred eight thousand, nine hundred twenty-eight".